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  2. Butterworth cover - Wikipedia

    en.wikipedia.org/wiki/Butterworth_Cover

    Butterworth hatches are not the main access hatches, but are the servicing hatches, and are generally closed with a metal cover plate with a gasket that is fastened to the deck by a number of bolts which stick up from the deck. Holes on the edges of the plate fit over these bolts and the cover is fastened down with nuts or dogs.

  3. Icebird (ship) - Wikipedia

    en.wikipedia.org/wiki/Icebird_(ship)

    The 'tween-deck hatch covers doubled as pontoons, accompanied by an ice-strengthened pusher barge, features which would permit offloading cargo in remote areas. "It was a standard box construction, superstructure aft with side cranes.

  4. Concordia yawl - Wikipedia

    en.wikipedia.org/wiki/Concordia_yawl

    Concordia Yawls #85 Arapaho and #82 Coriolis. The Concordia yawl is a class of wooden yawl sailboats; it was designed in 1938 by the naval architect C. Raymond Hunt with input from Llewellyn and Waldo Howland, Clinton Crane, Fenwick Williams and Frank Paine. [1]

  5. Lake freighter - Wikipedia

    en.wikipedia.org/wiki/Lake_freighter

    SS Henry Steinbrenner, May 11, 1953, Lake Superior, 17 of 31 crew died, (flooded after the cargo hatch covers were lost during a storm) SS Emperor, June 4, 1947, Lake Superior, 12 of 33 crew died, (ran into rocks at Isle Royale) SS Superior City, August 20, 1920, Lake Superior, 29 of 33 crew died, (collision with freighter Willis L. King)

  6. Hold (compartment) - Wikipedia

    en.wikipedia.org/wiki/Hold_(compartment)

    Six large cargo hatch covers on a capesize bulk carrier ship as she approaches the Egyptian-Japanese Friendship Bridge. A cargo hatch or deck hatch or hatchway is type of door used on ships and boats to cover the opening to the cargo hold or other lower part of the ship. To make the cargo hold waterproof, most cargo holds have cargo hatch.

  7. Robert MacGregor (engineer) - Wikipedia

    en.wikipedia.org/wiki/Robert_MacGregor_(engineer)

    Robert MacGregor was a British engineer, who, during the 1920s, concerned over unnecessary losses of North Sea colliers, developed the first steel hatch cover.. The design was simple and consisted of five articulated leaves that stowed neatly at the end of each hatch.